Staging: brcm80211: remove ROUNDUP macro

And use the kernel provided 'roundup' instead.

Cc: Brett Rudley <brudley@broadcom.com>
Cc: Henry Ptasinski <henryp@broadcom.com>
Cc: Nohee Ko <noheek@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/brcm80211/sys/wlc_ampdu.c b/drivers/staging/brcm80211/sys/wlc_ampdu.c
index 8a22536..ccf7780 100644
--- a/drivers/staging/brcm80211/sys/wlc_ampdu.c
+++ b/drivers/staging/brcm80211/sys/wlc_ampdu.c
@@ -662,7 +662,7 @@
 			mcl &= ~(TXC_STARTMSDU | TXC_SENDRTS | TXC_SENDCTS);
 		}
 
-		len = ROUNDUP(len, 4);
+		len = roundup(len, 4);
 		ampdu_len += (len + (ndelim + 1) * AMPDU_DELIMITER_LEN);
 
 		dma_len += (u16) pkttotlen(osh, p);
@@ -806,7 +806,7 @@
 		fbr_iscck = ((ltoh16(txh->XtraFrameTypes) & 0x3) == 0);
 		len = fbr_iscck ? WLC_GET_CCK_PLCP_LEN(txh->FragPLCPFallback)
 		    : WLC_GET_MIMO_PLCP_LEN(txh->FragPLCPFallback);
-		ampdu_len -= ROUNDUP(len, 4) - len;
+		ampdu_len -= roundup(len, 4) - len;
 
 		/* patch up the first txh & plcp */
 		txh = (d11txh_t *) PKTDATA(pkt[0]);